no memory region specified for section '.eh_frame' (Ubuntu 16 i686)

[advancedwebdeveloper]

Hi.
I believe you know the cause of this bug.

[ryankurte]

i am not at all sure this is it but, usually with ARM we specify the GNU/gcc linker rather than LLD with .cargo/config:

[target.armv7-unknown-linux-gnueabihf]
linker = "arm-linux-gnueabihf-gcc"

have you tried building with the appropriate GNU linker for riskv?

also may be related to: rust-embedded/wg#36 (comment)

[advancedwebdeveloper]

~/Desktop/rust-sipeed-longan-nano-master$ cargo build
Compiling r0 v0.2.2
Compiling panic-abort v0.3.1
Compiling rust-sipeed-longan-nano v0.1.0 (/home/oceanfish81/Desktop/rust-sipeed-longan-nano-master)
warning: unnecessary parentheses around assigned value
--> src/main.rs:8:25
|
8 | const rcu_apb2en: u32 = (0x4002_1000 + 0x18);
| ^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
|
= note: #[warn(unused_parens)] on by default

warning: unnecessary parentheses around assigned value
--> src/main.rs:10:25
|
10 | const gpioa_ctl0: u32 = (0x4001_0800 + 0x0);
| ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses

warning: unnecessary parentheses around assigned value
--> src/main.rs:11:25
|
11 | const gpioa_data: u32 = (0x4001_0800 + 0xc);
| ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses

warning: unused import: panic_abort
--> src/main.rs:13:5
|
13 | use panic_abort;
| ^^^^^^^^^^^
|
= note: #[warn(unused_imports)] on by default

warning: constant rcu_apb2en should have an upper case name
--> src/main.rs:8:7
|
8 | const rcu_apb2en: u32 = (0x4002_1000 + 0x18);
| ^^^^^^^^^^ help: convert the identifier to upper case: RCU_APB2EN
|
= note: #[warn(non_upper_case_globals)] on by default

warning: constant gpioa_ctl0 should have an upper case name
--> src/main.rs:10:7
|
10 | const gpioa_ctl0: u32 = (0x4001_0800 + 0x0);
| ^^^^^^^^^^ help: convert the identifier to upper case: GPIOA_CTL0

warning: constant gpioa_data should have an upper case name
--> src/main.rs:11:7
|
11 | const gpioa_data: u32 = (0x4001_0800 + 0xc);
| ^^^^^^^^^^ help: convert the identifier to upper case: GPIOA_DATA

error: linking with riscv32-unknown-elf-gcc failed: exit code: 1
|
= note: "riscv32-unknown-elf-gcc" "-L" "/home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib" "/home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.19pbfx1e7ppiz22i.rcgu.o" "/home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.1gxn96a4ynn6krtc.rcgu.o" "/home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.1rrq47tcmo7r1d7q.rcgu.o" "/home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.2oywxm1qwyrau2j5.rcgu.o" "/home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.36wqpyrxaht0bqyw.rcgu.o" "/home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.4g879aqcx3v63xcn.rcgu.o" "/home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.hpztk5fc5xtxkyj.rcgu.o" "-o" "/home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5" "-Wl,--gc-sections" "-nodefaultlibs" "-L" "/home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps" "-L" "/home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/debug/deps" "-L" "/home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib" "-Wl,-Bstatic" "/home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/libr0-c85b5ab54aceb5f9.rlib" "-Wl,--start-group" "/home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/libpanic_abort-37322ac1e75fee7c.rlib" "/home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/librustc_std_workspace_core-1bd0d3673780d693.rlib" "/home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcore-5aec724f1f867fb1.rlib" "-Wl,--end-group" "/home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib" "-Tlink.x" "-Wl,-Bdynamic"
= note: /usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.19pbfx1e7ppiz22i.rcgu.o: can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.19pbfx1e7ppiz22i.rcgu.o
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.1gxn96a4ynn6krtc.rcgu.o: can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.1gxn96a4ynn6krtc.rcgu.o
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.1rrq47tcmo7r1d7q.rcgu.o: can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.1rrq47tcmo7r1d7q.rcgu.o
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.2oywxm1qwyrau2j5.rcgu.o: can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.2oywxm1qwyrau2j5.rcgu.o
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.36wqpyrxaht0bqyw.rcgu.o: can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.36wqpyrxaht0bqyw.rcgu.o
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.4g879aqcx3v63xcn.rcgu.o: can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.4g879aqcx3v63xcn.rcgu.o
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.hpztk5fc5xtxkyj.rcgu.o: can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/rust_sipeed_longan_nano-2df4b3c694b8dfb5.hpztk5fc5xtxkyj.rcgu.o
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcore-5aec724f1f867fb1.rlib(core-5aec724f1f867fb1.core.aewkdyag-cgu.0.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcore-5aec724f1f867fb1.rlib(core-5aec724f1f867fb1.core.aewkdyag-cgu.0.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/libpanic_abort-37322ac1e75fee7c.rlib(panic_abort-37322ac1e75fee7c.panic_abort.9h2oa02d-cgu.0.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/Desktop/rust-sipeed-longan-nano-master/target/riscv32imac-unknown-none-elf/debug/deps/libpanic_abort-37322ac1e75fee7c.rlib(panic_abort-37322ac1e75fee7c.panic_abort.9h2oa02d-cgu.0.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.107.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.107.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.21.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.21.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.27.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.27.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.39.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.39.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.41.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.41.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.70.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.70.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.73.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.73.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.75.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.75.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.78.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.78.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.80.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.80.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.87.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.87.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.93.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.93.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.98.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.98.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.125.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.125.rcgu.o)
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.17.rcgu.o): can't link soft-float modules with double-float modules
/usr/local/lib/gcc/riscv32-unknown-elf/10.2.0/../../../../riscv32-unknown-elf/bin/ld: failed to merge target specific data of file /home/oceanfish81/.rustup/toolchains/nightly-i686-unknown-linux-gnu/lib/rustlib/riscv32imac-unknown-none-elf/lib/libcompiler_builtins-deaf2d068ddf18c0.rlib(compiler_builtins-deaf2d068ddf18c0.compiler_builtins.7egkskwx-cgu.17.rcgu.o)
collect2: error: ld returned 1 exit status

error: aborting due to previous error; 7 warnings emitted

error: could not compile rust-sipeed-longan-nano

To learn more, run the command again with --verbose.

[advancedwebdeveloper]

That's with

[target.riscv32imac-unknown-none-elf]
linker = "riscv32-unknown-elf-gcc"

[advancedwebdeveloper]

However with

[target.riscv32imac-unknown-none-elf]
linker = "riscv32-unknown-elf-ld"

I didn't get any error:

$ cargo build
Compiling panic-abort v0.3.1
Compiling r0 v0.2.2
Compiling rust-sipeed-longan-nano v0.1.0 (/home/oceanfish81/Desktop/rust-sipeed-longan-nano-master)
warning: unnecessary parentheses around assigned value
--> src/main.rs:8:25
|
8 | const rcu_apb2en: u32 = (0x4002_1000 + 0x18);
| ^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
|
= note: #[warn(unused_parens)] on by default

warning: unnecessary parentheses around assigned value
--> src/main.rs:10:25
|
10 | const gpioa_ctl0: u32 = (0x4001_0800 + 0x0);
| ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses

warning: unnecessary parentheses around assigned value
--> src/main.rs:11:25
|
11 | const gpioa_data: u32 = (0x4001_0800 + 0xc);
| ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses

warning: unused import: panic_abort
--> src/main.rs:13:5
|
13 | use panic_abort;
| ^^^^^^^^^^^
|
= note: #[warn(unused_imports)] on by default

warning: constant rcu_apb2en should have an upper case name
--> src/main.rs:8:7
|
8 | const rcu_apb2en: u32 = (0x4002_1000 + 0x18);
| ^^^^^^^^^^ help: convert the identifier to upper case: RCU_APB2EN
|
= note: #[warn(non_upper_case_globals)] on by default

warning: constant gpioa_ctl0 should have an upper case name
--> src/main.rs:10:7
|
10 | const gpioa_ctl0: u32 = (0x4001_0800 + 0x0);
| ^^^^^^^^^^ help: convert the identifier to upper case: GPIOA_CTL0

warning: constant gpioa_data should have an upper case name
--> src/main.rs:11:7
|
11 | const gpioa_data: u32 = (0x4001_0800 + 0xc);
| ^^^^^^^^^^ help: convert the identifier to upper case: GPIOA_DATA

warning: 7 warnings emitted

Finished dev [unoptimized + debuginfo] target(s) in 0.95s

[advancedwebdeveloper]

I am able to see the binary file, as described here - it is just I have my toolchain offers "riscv32-unknown-elf" prefix, for the executibles, instead of "riscv-nuclei-elf-"

[ryankurte]

ahh can't link soft-float modules with double-float modules is familiar, though i can't find the issues i tracked down to solve this. on armhf this is sometimes resolved by adding a linker path to the correct libraries for the ABI, something like this in .cargo/config from an armhf project of mine:

[target.thumbv7em-none-eabihf]

rustflags = [
   "-C", "linker=arm-none-eabi-gcc",
   "-C", "link-arg=-L/usr/lib/arm-none-eabi/lib/thumb/v7e-m/fpv4-sp/hard/",
]

I am able to see the binary file, as described here - it is just I have my toolchain offers "riscv32-unknown-elf" prefix, for the executibles, instead of "riscv-nuclei-elf-"

great! you should just be able to change file paths then?

[advancedwebdeveloper]

ahh can't link soft-float modules with double-float modules is familiar, though i can't find the issues i tracked down to solve this. on armhf this is sometimes resolved by adding a linker path to the correct libraries for the ABI, something like this in .cargo/config from an armhf project of mine:

[target.thumbv7em-none-eabihf]

rustflags = [
   "-C", "linker=arm-none-eabi-gcc",
   "-C", "link-arg=-L/usr/lib/arm-none-eabi/lib/thumb/v7e-m/fpv4-sp/hard/",
]

@lupyuen , could you help here?

Let's ask those who know how to do that properly.

I am able to see the binary file, as described here - it is just I have my toolchain offers "riscv32-unknown-elf" prefix, for the executibles, instead of "riscv-nuclei-elf-"

great! you should just be able to change file paths then?
Not really.
After replacing "-gcc" with "-ld" I got a binary, on the output - but has an oddly small size (a bit larger then 1 KB, compared to 20+ KB for known firmware binaries.)
After downloading via DFU my Longan Nano does not boot even a LED related demo project.
Something is wrong.

CC @zsdonghao @junhuanchen @myuanz @QinYUN575 @btx000 @pcotret @Zepan @MindShow

[luojia65]

It says can't link soft-float modules with double-float modules, what could this 'double-float module' be? There's no float and double extension in rust's riscv32imac target.

[advancedwebdeveloper]

I could try to reproduce again an share all generated artifacts

[pcotret]

After downloading via DFU my Longan Nano does not boot even a LED related demo project.
Something is wrong.
CC @zsdonghao @junhuanchen @myuanz @QinYUN575 @btx000 @pcotret @Zepan @MindShow

The only problem I had related to this was that my Longan Nano was kinda stuck.
https://github.com/sipeed/Longan-DOC/blame/master/en/get_started/blink.md#L104

Development board hold down the BOOT key, then press the RESET button to restart development board and then release the BOOT button to enter DFU mode.

[therealprof]

i am not at all sure this is it but, usually with ARM we specify the GNU/gcc linker rather than LLD with .cargo/config:

Who is "we" and why are you doing that?

[advancedwebdeveloper]

I see that something is rather wrong with the config.

For instance I tried to build https://github.com/pdx-cs-rust/nanoball - but it failed, with my recent ~/.cargo/config file.
Once I removed it (but didn't touch anything inside ./.cargo/config file ) - I was able to build the project.
I see the animation on Longan Nano's LCD screen, right now.

[ryankurte]

Who is "we" and why are you doing that?

org project, because inexplicably when you start linking external c libraries the linker seems to break in a variety of horrifying ways / stop being able to infer a bunch of things like this correctly.

what could this 'double-float module' be

oh yeah this is, v different from what i was thinking.

[advancedwebdeveloper]

@barafael , experiencing an uncertain situation with your demos:
barafael/rust-sipeed-longan-DAC#1